The correct answer is B. A number of scientific institutions were founded
Explanation
The Enlightenment was a historic period that was characterized by the paradigm shift based on the abandonment of religious knowledge to strengthen human reason and science. Known as The Century of Lights. Also, in this period the education system was developed in all fields, the reading and literacy became massive, more scientific institutions as schools, libraries and universities were built and founded. So, the correct answer is B. A number of scientific institutions were founded.
I would go with B, "populations declined in urban areas"
Explanation:
For all 3, the urban population is much greater in 100 CE than 1000 CE. I find the graphs to be set up in a poor way and you'd expect them to have grown, so forgive me if I'm wrong.